How and Why to Use PIN Diodes for RF Switching | DigiKey
2016年12月28日 · It is used to prevent damage to the receiver from large input signals, while allowing the receiver to function normally in the absence of a large signal. This device combines a PIN diode and a Schottky diode to form a low-power limiter. The PIN diode is at the input to protect the Schottky diode from high RF power levels (Figure 12).
In addition, the PIN diode has the ability to control large RF signal power while using much smaller levels of control power. Microsemi PIN diodes offer a unique highly reliable package due to voidless construction, metallurically bonded pin structure, and an extremely rugged SOGO surface passivation.
Infineon PIN diodes are ideal for a wide range of RF applications. Their low insertion loss and fast switching time makes them ideal for use in Rx-Tx antenna switches. They are offered in industry-standard 0201 and 0402 form factors as well as conventional industry packages and various junction diode configurations.
PIN diode is useful for attenuating, leveling and ampli- tude modulating an RF signal. When the control cur- rent is switched “on” and “off” or in discrete steps. the device is useful for switching, pulse modulating, and phase shifting of an RF signal. In …
PIN Limiter Diodes The receiver protector function is performed by a specially processed PIN diode, known as a limiter diode. The PIN limiter diode is an incident-power-controlled, variable resistor. In the case when no large input signal is present, the impedance of
PIN diode RF switch and attenuator circuit design diagrams
This circuit utilizes unique properties of a PIN diode to control the attenuation (reduction in signal strength) of an RF or microwave signal. PIN diode is connected in series between RF input and RF output.
At these types of frequencies, a PIN diode is fundamentally a device with an impedance controlled by its DC excitation. A unique feature of the PIN diode is its ability to control large amounts of RF power with much lower levels of DC. This Application Note …
In switch and attenuator applications, the PIN diode should ideally control the RF signal level without introducing distortion which might change the shape of the RF signal. An important additional feature of the PIN diode is its ability to control large RF signals while using much smaller levels of dc excitation.
Switches that control the path of RF power from very low frequencies through the low millimeter-wave range are the most common application for PIN diodes. The level of DC bias applied to the diode determines its impedance.
NuWaves has developed a highly reliable reflective PIN Diode Switch for operation in the VHF/UHF bands. It employs PIN diode technology to achieve high power handling capabilities > 150 Watts between 50 – 512 MHz. The simple 5VDC power and TTL control lines allow for ease of use and operation. With the utilization of series-shunt PIN
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